Table for casting glass sheets and plates



Aug. 18, 1931. Y. BRANCART 7 TABLE FOR CASTING GLASS SHEETS AND PLATESPatented Aug. 18, 1931 YVON BRANGABT, OF VEBRERIES DE FAUQ UEZ,RONQUIERES, BELGIUM TABLE FOR CASTING GLASS SHEETS AND PLATESApplication filed Febuary 14, 1930, Serial No.

This invention relates to means for im proving the cooling of castingtables used in glass works and plate glass works, in order to prolongthe existence of such tables 6 which, owing to the high temperatures towhich they are subjected when the molten glass is poured thereon,undergo deformations that may cause them to break.

Casting tables are usually cooled by means of a How of water circulatingunder the plate and in contact with ribs provided thereon in order toincrease its cooling surface. After the late has been in use for sometime, it bu ges out under the action of heat, and it may happen thatsome portions of its under side being raised by this bulging are nolonger in contact with the water and become overheated. Moreover steamaccumulates under these bulged portions and prevents the water fromcooling the table uniformly. Such local overheating is often sufiicientto cause thebursting of the plate.

According to the present invention, the first mentioned inconvenience isremoved by having the cooling water supply and discharge pi es openinginto recesses in the under sur ace of the plate at points situated abovethe level of the bulging portions thereof, so that the flow of watertends to settle at a higher level than said portions. On the other hand,the accumulation of steam is avoided by arranging, at the point wherethe greatest bulging takes place, one or more small pipes which openoutside the table, thus permitting the steam to escape from under theplate.

These two devices are shown diagrammatically in the accompanyingdrawings, in which:

Fig. 1 is a view of the casting table in cross-section through one end.

Fig. 2 shows the table in side view, and

Fig. 3 in longitudinal section.

In these figures, 1 indicates the plate, 2 the ribs of the latter, 3 thechamber for the circulation of cooling water, and 4 the bottom plate ofsaid chamber. The water enters chamber 3 through supply pipes 5 placedat that end of the table which first 428,396, and in Belgium February21, 1929.

undergoes the contact of the molten glass,- and is led oil throughdischarge pipes 6 at the other end of the table. These pipes 6 arenarrower than the supply pipes. 5 in order that the chamber 3 shallalways be filled with water. i

The two supply ipes 5 are preferably arranged on the si es of the plate1 and they open into recesses or fountains 7 provided in the undersurfaces of the latter. Similar recesses 8 accommodate the upper ends ofthe discharge pipes 6 at the other end of the table, so that the wateris supplied and discharged at a level above the under surface of theplate and thus washes 5 all the parts of thef' latter, even those thatare bulged out.

. In the central portion of plate 1, where the bulging is greatest andwhere the steam evolved from the cooling water tends to accumulate, asmallpipe 9 which may open into a recess 10 (Fig. 1) or simplyunderneath the plate (Fig. 3), and extends upwards through the chamber 3and plate 4, evacuates the steam outside the table as soon 76 as it isformed. This small pipe 9 is given a very small sectional area so thatonly small quantities of water are allowed to run out through it whenthere is no steam to be ejected.

The invention may be applied to movable casting tables as well as toordinary stationary tables.-

I claim:

1. A table for casting glass sheets and plates comprising a glassreceiving plate said plate extending over the entire surface of saidtable, a chamber under said plate, a closure for said chamber, tworecesses in the underside of said plate, an an inlet and an outlet pipeeach opening into one of said recesses.

2. A table for casting glass sheets and plates comprising a metal plateextending over the entire surface of said table for receiving the glass,said plate having a ribbed underside, a chamber under said plate, meansfor closing said chamber, two water pipes opening each into said chamberat a level above the underside of said plate, and r means for evacuatingsteam from the top of said chamber.

3. A table for casting glass sheets and plates comprising a metal platefor receiving the glass, sald plate having ribs on its underside andgrooves between said ribs,

a chamber under said plate, a bottom plate closing said chamber, tworecesses located each in one of said grooves at opposite ends of saidchamber, two water pipes opening each into one of said recesses at alevel above the bottom of said grooves and a steam outlet tube of smallcross-section leading from the top of the central portion of saidchamber.

4. A table for casting lass sheets and plates comprisin a metal p atefor receiving the glass, a charm er under said plate, a closure forsaidchamber, two recesses in the underside of said plate, two waterpipes each opening into one of said recesses, and a steam evacuatingpipe of small cross section gpening into the top portion of said cham-5. A table for casting glass sheets and plates comprising a metal platefor receiving the glass, a chamber under said plate, a closure for saidchamber, three recesses in the undersideof said plate, and three pipeseach opening into one of said recesses, one of said pipes being of verysmall cross section.

YVON BRANCART.

